Device for automatically turning over leaves of a book formed with several turning-arms



A. W. RIEBE. DEVICE FOR AUTOMATICALLY TURNING OVER LEAVES or A BOOK FORMED WITH SEVERAL TURNING ARMS.

APPLICATION FILED JULY 2, I920- Patented Oct. 25

UNITED STATES PATENT @FFECE.

ALBERT WERNER RIEBE, OF KfiNIGSBERG, GERMANY.

DEVICE FOR AUTOMATICALLY TURNING OVER- LEiVES OF A BOOK FORMED WITH SEVERAL TURNENG-ARMS.

Application filed July 2, 19.20.

T 0 all whom it may concern:

Be it known that I, ALBERT WERNER Rrnnn, owner of a factory, a subject of the German State, and a. resident of Kenigsberg, Prussia, Germany, have invented certain new and useful Improvements in Devices for Automatically Turning Over Leaves of a Book Formed with Several Turning-Arms; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters or figures of reference marked thereon, which form a part of this specification.

The invention consists in providing means whereby performers may, by a slight touch upon a control member release a spring under tension which actuates a shaft carrying a change gear mechanism for operating a plurality of leaf turning arms. Said change gear comprises spring actuated 'entraining members or carrier bows that engage the turning arms and are automatically actuated at the end of the turning movement to release said arms. The automatic release being effected by pins on the bows moving against a guide body situated in the path of the pins.

To adapt the turning arms for the leaves to the actual height of the music-book, the main shaft is madeextensible by a second telescoping shaft, provided with a longitudinal groove into which a key on the main shaft slides. On the rotation of the main shaft the hollow shaftwith the change gear for the leaf turning arm moves therewith. As will be understood the number of the turning arms depends on the number of the leaves to be turned.

In the accompanying drawingv Figure 1 is a side elevation of a preferred form of apparatus embodying my invention.

Fig. 2 is a longitudinal section of the change gear on a larger scale.

Fig. 3 is a top plan view of the change gear.

Fig. 4 is a top plan view of the carrierbow.

Fig. 5 is a section on the line a--a of Fig. 2.

a plan view of the bottom part Specification of Letters Patent.

Patented Oct. 25, 1921.

Serial No. 393,745.

Fig. 7 Fig. 1.

A shaft 1 is mounted in the music-rack of which only the upper and lower cross pieces 2 are shown. This shaft has secured thereto a spiral spring 3, fixed at its top in a collar 4 on the shaft 1 and at its bottom in the lower piece of the music-rack. Pushed over the upper end of the shaft 1 is a hollow shaft 5, having through its length a groove for the reception of a key 6 on the shaft 1 to prevent relative axial displacement of the two shafts.

Due to this arrangement both parts can be drawn apart and the turning arms adjusted to the height of the book: The hollow shaft 5 has fixed thereon at 7 the change gear mechanism, hereinafter described, for turning over the arms 8 for the leaves. These arms are loosely pivoted on the hollow shaft, and are preferably made of thin sheet steel or othersuitable material. To effect their connection with the leaves of the music-book they are formed with notches -9.

In the example shown 14 arms are provided. Externally, the extensible shafts 1 and 5-are surrounded by two telescoping tubes lO-and 11. By means of a button 12 at the end of the hollow shaft 5, the spring 3 is tensioned by giving it a turn. The lower end of the shaft 1 is mounted in the bottom member 2 of the music-stand and carries'at said end a catch or ratchet-wheel 14 having two diametrically arranged cogs 15. A pawl 16 engages a cog 15 of the catch-wheel, thus preventing the shaft 1 from turning under the action of the ten sioned spring 3.

To release the ratchet-wheel 14 a pressure is exercised on a manipulator or foot lever (not shown) connected with a lever 17. Such a manipulator acts on a trigger-shaft 18 and effects the release of the pawl 16; whereby the shafts 1 and 5 together with the change gear 7 is'made to rotate under the operation of the spring 3.

The change gear 7 which actuates the arms and makes half a rotation, turns over a leaf of the music-book at each release of the ratchet-wheel 14. After the release of the ratchet-wheel 14 has taken place, a balance spring 19 Fig. 7 brings about the engagement behind the second cog 15 of the ratchet-wheel 14.

For the eonstruction and operation of the is a side view of the bottom part of change gear as a whole, reference is made to Figs. 2 to 5. Said gear is constituted by a sliding disk 20, mounted on the hollow shaft 5 and having guide slots 21. Carrierbows or slides 23 and 24 are radially displaceable on the disk by means of pins 30 which project through the slots 21. By means of a projection or tappet 25 the car riers grip behind a lip 26 of the turning arms 8. The two slides or bows 23 and 24, as shown in Fig. 4 are yieldingly connected together by means of tubes 27 on one member and rods 28 on the other member mounted to slide in the tubes. Spiral springs 29 surrounding the tubes 2'? and rods 28 effect a normal spreading apart of the two bows 23 and 24.

The pins 30 projecting through the guide slots 21 of the disk 20 extend into a chamber 31 formed in a socket 32 mounted on the hollow shaft 5 below the disk 20.

A guide body 33 of the form shown in Fig. 5 is -mounted in the chamber 31; the inner edge of this body is adapted to engage the pins 30- of the carrier-bows, when the latter are rotated by the disk 20, and actuate said bows as hereinafter described.

The turning of a leaf is effected as follows A pressure on the manipulator or foot lever, connected with the lever 17 releases the pawl 16 from the ratchet-wheel 14,

whereby the tensioned spring 3 rotates the shafts 1 and 5, therotatable disk 20, and the carriers 23 and 24. The. tappet 25 of the bow 23 or 24, taking hold behind the lip 26 of an arm 8, swings the latter and turns over a leaf. The movement of the swinging'arm corresponds to the distance indicated by dotted lines 34 and 35 in Fig. 5.

At the end of this movement the pin 30, on the carrier-bow 24 whose tappet 25 is in engagement with the lip 26 of an arm 8, is engaged by the edge of the cam body 33 and during the passage of the pin between the points indicated by dotted lines 35 and 36 it'is moved with the bow 24 inward toward the axis of the shafts as indicated in Fig. 4. This inward movement of the bow causes the tappet 25 to release the lip 26 of the turned over arm 8, and from the point 37 to 34, owing to the form of body 33 the carrier bow is gradually moved-by the action of the springs 29 away from the axis of the shafts allowing the tappet25 to assume a position behind the lip 26 of the arm 8 which is to be turned over during the following manipulation of the releasing pawl 16. The two bows 23 and" 24 are yieldingly connected, springs 29 being between them, and are independently movable to and from the axis of rotation, by reason of thetelescoping elements 27 and 28.

To 'eflect an exact'adjustment of the body 35,the soc ket 32 which carries said body is rotatably mounted in the tube 11, which has a slot 38 therein to permit the passage of a set screw 39 for locking the socket to the tube.

1. A leaf turner, comprising a rotary shaft, a plurality of turning arms carried thereby, radially movable arm actuating members operable by the movement of the shaft, and means for radially moving the actuating members into and out of operative relation with the turning arms during the movement of the shaft.

2. A music leaf turner comprising a rotary shaft, a plurality of leaf turning arms mounted thereon, radially movable arm actuating members carried by the shaft normally engaging the arms, and means operated by the movement of the shaft for radially moving the actuating members out of en agement with the turning arms.

music leaf turner comprising a spring actuated rotary shaft, a plurality of leaf turning arms carried thereby, radially movable arm actuating members movable with the shaft, means for radially moving said members into operative connection with the arms, and means operated by the movement of said members to automatically radially disconnect them from the arms.

,4. A, music leaf turner comprisin a spring actuated rotary shaft, means to lock the shaft against the action of the spring, means to release the locking means, a plurality of leaf turning arms carried by the shaft, radially movable arm actuating members connected with and operated by the movement of the shaft, means for ra dially moving the actuating members into operative connection with the arms, and

means operated by the movement of said members to automatically disconnect the latter from the arms. 7 a

5. A music leaf turner comprising a spring actuated rotary shaft, a plurality of leaf turning arms carried by the shaft, a disk connected with the shaft, arm-operating membersmounted on and movably connected with the disk, springs for radially .moving said members into operative connection with the arms, and means to move the arm operating member. against the action ofthesprings to movesaid members out of operative connection with the arms.

. 6. A music leaf turner comprising a spring actuated rotary shaft, means to tension the spring, means to .lock the shaft against the action of the spring, means to release the locking meanspa plurality of leaf turning arms carried by the shaft, a disk connected with the shaft, radially movable arm operating members mounted on and movably connected with the disk, springs for moving said members radially into operative connectlon with the arms, and cam means to move the arm operating member against the action of the springs to move said members out of operative connection with the arms.

7 A music leaf turner, comprising a spring actuated rotary shaft, a plurality of leaf-turning arms carried thereby radially displaceable slides carried by the shaft, springs interposed between the slides adapted to move them into engagement with the leaf-turning arms, pins on said slides, and a guide mounted in the path of the pins adapted to move the slides against the action of the springs to disconnect said slides from the arms.

8. A music leaf turner, comprising a spring actuated rotary shaft, means to tension the spring, means to lock the shaft against the action of the spring, means to release the locking means, a plurality of leaf-turning arms supported by the shaft,

a disk connected with the latter, slides mounted on and having pins projecting through radial slots in the disk, springs interposed between the slides for spreading them apart, projections on the slides adapted to engage the turning arms, a fixed socket member below the disk, and a guide mounted in the socket arranged to engage the pins whereby the slides are moved toward and from the axis of the shaft during the rotation of the latter to automatically move the slides into and out of operative relation to the leaf turning arms.

In testimony that I claim the foregoing as my invention, 1 have signed my name in presence of two subscribing witnesses.

ALBERT WVERNER RIEBE.

Witnesses:

LURA CLARA Bnsro, O'rro WEINSOP. 

